390 



LABORATORY MANUAL OF HUMAN ANATOMY 



(c) Neck of hammer (collum mallei). 



(d) Lateral process (processus lateralis) (0. T. processus brevis). 



(e) Anterior process (processus anterior [Folii]) (0. T. processus gra- 



cilis). 



Joints and Ligaments of the Auditory Ossicles, 

 Study the following: 



Joints (Articulationes ossiculorum auditus). 



(a) Joint between anvil and hammer (articulatio incudomalleolaris) . 



(b) Joint between anvil and stirrup (articulatio incudostapedia) . 



(c) Junction of stirrup and tympanum (syndesmosis tympanosta- 



pedia). 



FIG. 192. 



Posterior wall of the apex 

 of the recess (fold of mucous membrane) 

 Apex of the recess / 



Lig. mallei superius. 



Capitulum mallei in longitudinal ^ 

 section 



Plica incudis 



Cms longum incudis,. 



Insertion of the M. tensor. 



tympani 



Processus lenticularis - 



Manubrium mallei 

 Stratum mucosum'' 

 Substantia propria-'" 



Membrana 

 tympani 



Annulus fibro- 

 cartilagineus 



Sulcus tympanicus/ 



Recessus epitympanicus 



.Lig. mallei laterale 



,__ Recessus membranae tympani 

 superior 



'~*~ - Pars flaccida membranae tympani 



~"~--Prominentia malleolaris 

 : Umbo membranae tympani 



~^-Meatus auditorius extern us 



-Stratum cutaneum of the drum 

 membrane 



Frontal section of the left tympanic membrane and of the adjacent part of the external auditory 

 passage, meatus acusticus externus, made after hardening in chromic acid and alcohol and decalcifica- 

 tion with hydrochloric acid. The section passes through the head of the malleus and in front of the 

 manubrium mallei. Seen from in front. (After Toldt, Anat. Atlas, Wien, 1903, 3 Aufl., p. 925, Fig. 1423.) 



Ligaments (Ligg. ossiculorum auditus). 



(a) Anterior ligament of hammer (Lig. mallei anterius). 



(b) Superior ligament of hammer (Lig. mallei superius). 



(c) Lateral ligament of hammer (Lig. mallei laterale) (0. T. external 



ligament). 



(d) Superior ligament of anvil (Lig. incudis superius). 



(e) Posterior ligament of anvil (Lig. incudis posterius). 



(f) Obturator membrane of stirrup (membrana obturatoria [sta- 



pedis]). 



(g) Annular ligament of base of stirrup (Lig. annulare baseos sta- 



pedis). 



